TSC( Resistive touch controller)

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TSC( Resistive touch controller)

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shivakumar1
Contributor II

Hi 

We need some information on TSC pin details for imx6ull series processor. where we need to connect X+,X-,Y+,Y-(4 wire resistive touch interface). could you please provide details on that. 

Please suggest external IC for resistive touch interface which has linux driver available. we have 2 feet distance from TFT LCD signal to main controller.

Also please let us know how can we do signal condition for those resistive touch signal. 

Regards

shivakumar L V

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Pavel
NXP TechSupport
NXP TechSupport

Use the i.MX6ULL touch screen controller for connection to resistive touch panel. See the Chapter 53 of the i.MX6UL Reference Manual:

https://www.nxp.com/webapp/Download?colCode=IMX6ULRM

See the Section 53.2.2.3 for pins connection.

See the following document:

http://www.3m.com/us/electronics_mfg/touch_systems/ewcd/Korea/downloads/PDFs/ResistiveIntegrationGui...

This document shows that length up 20 inches is possible. It is near to your length.

 

See also the following application note:

https://www.ti.com/lit/an/sbaa036/sbaa036.pdf?ts=1606420386763&ref_url=https%253A%252F%252Fwww.ti.co....

 

and

 

https://www.analog.com/en/analog-dialogue/articles/gesture-recognition-on-resistive-touch-screens.ht...

 

There are few drivers for resistive touch. See the following pages:

https://www.ti.com/lit/an/slyt209a/slyt209a.pdf

 

https://www.cypress.com/file/134996/download

 

https://datasheet.octopart.com/LM8500IMT9B-Texas-Instruments-datasheet-10848462.pdf

 

https://datasheet.octopart.com/FTAS00-65AS4-NKK-Switches-datasheet-62059496.pdf

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